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The Properties of an UV Curable Support Material Pre-polymer for three dimensional printing

Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 278-281页

作者：黄兵莫健华 State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology Huazhong University of Science & Technology

An ultraviolet（UV） curable support material pre-polymer for three dimensional printing was prepared based on the synergistic effect between PEO-PPO-PEO tri-block copolymer（F127） and polyethylene glycol （400） di-acrylate（SR344）. The effects of jetting conditions, thermal stability, curing time, mechanical properties and shrinking rate on printing models were studied. The situation of removing support material from build model was investigated after building progress was completed. The experimental result shows that when F127 is 6.0wt%, SR344 is 20.0wt%, 4-Methoxy phenol is 0.15wt% and Irgacure 2959 is 1.5wt%, the support material pre-polymer could be jetted out from the nozzles smoothly during building up of three dimensional printing models at 50-55 ℃. In addition, the support material could be removed easily from building model without spoiling the model; furthermore, the forming precision of building model is improved.

关键词： three dimensional printing support material synergistic effect forming precision

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Part Orientation Optimization in three dimensional printing

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Computer Aided Drafting,Design and Manufacturing 2008年第1期18卷 19-25页

作者： LIU Hou-cai1,2 , MO Jian-hua1 , LIU Hai-tao1 (1. State Key Laboratory of Material Processes and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China 2. College of Electromechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

Part orientation is one of the important factors in manufacturing with three dimensional printing (3DP) of rapid prototyping system. The minimum building time, being achieved by the part’s minimum building height and minimum width in 3DP’s y direction, is set as the objective of optimizing the part orientation. Genetic algorithm is adopted to find the minimum building height of parts and then ergodic searching is used to get the minimum width of part in y direction. A corresponding program for optimizing part orientation in 3DP was developed. Tests show the proposed approach is effective and fast.

关键词： rapid prototyping three dimensional printing part orientation optimization genetic algorithm

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Use of three dimensional-printing in the management of floating aortic thrombus due to occult aortic dissection:A case report

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World Journal of Clinical Cases 2021年第7期9卷 1755-1760页

作者： Tie-Hao Wang Ji-Chun Zhao Fei Xiong Yi Yang Department of Vascular Surgery Sichuan University West China HospitalChengdu 610000Sichuan ProvinceChina

BACKGROUND Floating thrombus within the thoracic aorta is a rare entity but may cause systemic *** pathogenesis of floating aortic thrombi is not yet fully *** definitive guidelines are available for the management of floating aortic *** SUMMARY We report a 48-year-old patient,without a history of trauma and infection,who presented with sudden severe back pain.A floating thrombus within the aortic arch was found by computed tomography angiography(CTA).No evidence of coagulopathies was ***,with the assistance of a three dimensionalprinted model,this floating thrombus was identified to be caused by occult aortic dissection(AD).Subsequently,an emergency thoracic endovascular repair was *** patient’s back pain was rapidly alleviated *** at 1 year showed no filling defect in the stent-graft and *** Occult AD is a potential factor causing floating aortic thrombi,endovascular stent-graft exclusion may be an optimal therapeutic choice with promising ***,the combination of CTA and three dimensional-printed models can contribute to the diagnosis and treatment of floating aortic thrombi due to occult AD.

关键词： Floating thrombus Thoracic aorta Occult aortic dissection three dimensional printing Endovascular treatment Case report

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Advances in Study on three-dimensional printing in Pharmaceutics

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Chinese Herbal Medicines 2016年第2期8卷 121-125页

作者： Fang Zheng Sheng-wu Huang Zhejiang Chinese Medical University Hangzhou 310053China

three dimensional printing（3DP） is a solid freeform fabrication technology which employs powder processing and a liquid binder material in the construction of parts in a layer-wise manner. 3DP can accommodate much geometric outline and be made with many materials due to its unprecedented flexibility. The technology can control over the material composition, microstructure and surface texture so it attracts great attentions in the pharmaceutics field. 3DP can offer many novel strategies and approaches for the research and is widely focused in the field of the controlled-release drug delivery systems. Through consulting a large number of documents the current development and the technical characteristics of 3DP in pharmaceutics field are discussed and reviewed. It is expected that 3DP technique may play a tremendous role in pharmaceutics field in the *** dimensional printing （3DP） is a solid freeform fabrication technology which employs powder processing and a liquid binder material in the construction of parts in a layer-wise manner. 3DP can accommodate much geometric outline and be made with many materials due to its unprecedented flexibility. The technology can control over the material composition, microstructure and surface texture so it attracts great attentions in the pharmaceutics field. 3DP can offer many novel strategies and approaches for the research and is widely focused in the field of the controlled-release drug delivery systems. Through consulting a large number of documents the current development and the technical characteristics of 3DP in pharmaceutics field are discussed and reviewed. It is expected that 3DP technique may play a tremendous role in pharmaceutics field in the future.

关键词： controlled-release drug delivery excipient pharmaceutics three dimensional printing

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Titanium/Hydroxyapatite Composite and Functionally Graded Material Fabricated By three-dimensional printing

Titanium/Hydroxyapatite Composite and Functionally Graded Ma...

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中华口腔医学会第14次全国口腔医学学术会议（2012年会）

作者： Qian Chao,Sun Jian (Dept.of Prosthodontics,The Ninth People’s Hospital,School of Medicine,Shanghai Jiao Tong University,Shanghai 200011,China Shanghai Key Laboratory of Stomatology,Shanghai 200011,China)

Purpose:The aim of this study was to evaluate the feasibility of three-dimensional printing technology for the preparation and fabricate titanium/hydroxyapatite(Ti/HA)composite and functionally graded material(FGM)by three-dimensional printing,which providing the foundation theories and experimental bases of functionally graded material from designing,modeling,sintering and the performance evaluation. Methods:The CAD model of the Green Ti/HA composite was designed to be the cylinder(diameter 25mm,height 20mm)and set each layer with 100%bond area. The Ti/HA functionally graded material sample was divided into two layers,the upper layer with 100%Ti and the lower layer with 80%Ti/20%HA,which also design to be a CAD model of the cylinder with 25mm in diameter and 10 mm in *** three dimensional printing technology was used to process five specimens of 80%Ti/20%HA and three FGM *** process was comprised by debind sintering and the final *** specimens were first debinded under vacuum with 500℃.Then they were sintered under the protection of the argon gas with 1200℃*** sintered 80%Ti/20%HA composites were observed their microstructure,analyzed the diffraction element and tested in mechanical properties such as compressive *** the microstructure of sintered FGM specimens was also observed. Resu I ts:The sintered 80%Ti/20%HA specimens had the aperture size from 50 to 150μ*** XRD analysis of Ti/HA composite showed the characteristic peak contains Ca(PO),CaTiO,TiO and CaO features,which pointed that there occurred a chemical reaction between Ti and *** compressive strength was 184.3±*** Ti/HA functionally graded material,with its upper part for 80%Ti/20%HA layer and lower layer of 100%Ti,had graded structures with a visible decomposition of a clearer line between the two layers under the optical microscope. Conclusion:*** is confirmed that application of Ti/HA composite and functionally graded material fabricate

关键词： three dimensional printing titanium hydroxyapatite functionally graded material

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